Circles

Which vector arrow represents the speed of the ball?

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

What's the centripetal force of a .2 kg yoyo spun in a circle with a radius of .7 meters at a velocity of 3 m/s?

• 2.05 N

• 2.57 N

• 2.90 N

• 3.13 N

Which description best describes the velocity of an object in uniform circular motion?

• It changes magnitude and is tangent to the circle.

• It constantly changes magnitude and direction.

• It changes direction and is tangent to the circle.

• It changes magnitude and is towards the center of the circle.

Which of the following best describes CENTRIFUGAL force?

• It acts towards the center of the circle.

• It acts away from the center of the circle.

• It does not exist.

What is the centripetal acceleration of the ball?

Tags

NGSS.HS-PS2-1

The magnitude of the centripetal force acting on an object traveling in a horizontal, circular path will increase if the

• radius of the path is increased

• mass of the object decreased

• direction of motion of the object is reversed

• speed of the object is increased

There are two Polar Circles near the Poles. They are...

• Arctic Circle and Antarctic Circle

• Arctic and Southern Circles

• Circle of Cancer and Capricorn

• Northern Circle and Antarctic Circle

What is the formula for the circumference of a circle?

Which of the following describes the relationship between the radius and the area of a circle?

• The area is directly proportional to the radius.

• The area is inversely proportional to the radius.

• The area is proportional to the square of the radius.

• The area is independent of the radius.

A scientist is observing circular motion in a laboratory experiment. If the radius of the circle is doubled, what happens to the centripetal force required to maintain the same speed?

• It remains the same.

• It doubles.

• It halves.

• It quadruples.